you must have a set of pre established decisions to make based on what you observe Otherwise you

“you must have a set of pre-established decisions to make based on what you observe. Otherwise, you’ll freeze, take too long, or make a decision that is not in your best interest.”

Van Horne, Patrick, et al. Left of Bang: How the Marine Corps’ Combat Hunter Program Can Save Your Life. 2015, loc. 117.

Preparation is key. This is the same reason we have fire drills.